The invention relates to a method and a system for judging the temperature field change condition of a smelting furnace, which belong to the technical field of scrap copper smelting, and are used for collecting and transmitting temperature data in real time to accurately know the temperature distribution condition in the smelting furnace according to process information obtained by a plurality of sensors mounted on the smelting furnace. Particularly, the temperature distribution in the furnace is obviously changed; and a temperature distribution model is established by utilizing a modeling technology based on the collected multi-point temperature data, and is used for predicting and monitoring the change trend of the temperature in the furnace through data analysis, so that a decision basis is provided for temperature control of the smelting furnace, the energy consumption in the smelting process is reduced, and the competitiveness of a product is improved.